Blaze
The Midnight Rider
O'Donnell mentioned on their little Youtube infomercial unveiling that they want to rotate the finale, implying ISM isn't considered a permanent fixture there.
The two week summer break is obviously being driven by NBC and the Olympics, so it'll be interesting to see if by '21 the season is ending in October without it.
Don’t forget 2021 they can add and drop races, so probably have more changes.